For loop in Java

 

Java for loop

In Java, for loop is similar to C and C++. It enables us to initialize the loop variable, check the condition, and increment/decrement in a single line of code. We use the for loop only when we exactly know the number of times, we want to execute the block of code.

1. for(initialization, condition, increment/decrement) {    
2. //block of statements    
3. }    

The flow chart for the for-loop is given below.

Consider the following example to understand the proper functioning of the for loop in java.

//print "I love my India" 10 times

1. public class ForLoop1 {

   public static void main(String []args){

   for(int i=1;i<=10;i++){

   System.out.println("I love my India");

   }

   }

   }

2. 
   

Output:

I love my India
I love my India
I love my India
I love my India
I love my India
I love my India
I love my India
I love my India
I love my India
I love my India

//print 1 to 10

1. public class ForLoop2 {

   public static void main(String[] args) {

   for(int i=1; i<=10;i++){

   System.out.println(i);

   }

   }

   }

Output:

1
2
3
4
5
6
7
8
9
10

//print all even number from 1 to 10

1. public class ForLoop3{

   public static void main(String[] args) {

   for(int i=1;i<=10;i++){

   if(i%2==0){

   System.out.println(i);

   }

   }

   }

   }

2. 
   

Output:

2
4
6
8
10

//print all even numbers from 1 to 100 which are divisible by 5

1. public class ForLoop4{

   public static void main(String[] args) {

   for(int i=1;i<=100;i++){

   if(i%2==0){

   if(i%5==0){

   System.out.println(i);

   }

   }

   }

   }

   }

Output:

10
20
30
40
50
60
70
80
90
100